Class / Patent application number | Description | Number of patent applications / Date published |
131345000 | Including a cellulose ester or ether | 10 |
20110132381 | RAPIDLY DEGRADABLE FILTERS VIA ELECTRON IONIZATION - A method of forming a filter for a smoking article which includes exposing cellulose acetate fibers to an electron beam process, wherein electron beam process deacetylates the cellulose acetate fibers to render the cellulose acetate fibers water-permeable; and forming a cellulose acetate rod from a tow of the cellulose acetate fibers. Filter plugs of the cellulose acetate fibers are water-permeable and allow discarded filtered smoking articles to rapidly degrade and expose the components to the environment. | 06-09-2011 |
20110146697 | Method and apparatus for the plasma processing of filter material - One embodiment of the invention provides a method of manufacturing a filter material such as carbon suitable for use in a smoking article. The method includes modifying the filtration properties of the filter by altering the surface of the filter material. The surface alteration is performed by plasma processing and can be used, for example, to increase the acidic or basic properties of the surface. Another embodiment of the invention provides a filter produced by such a method. | 06-23-2011 |
20120037174 | TOBACCO PRODUCT FILTERS - A tobacco product filter is provided comprising a carrier material which comprises an immobilized ionic liquid. By the term “tobacco product filter” may particularly be meant all sorts of filters which are suitable to remove harmful substances, particles, gases or the like from tobacco smoke. In particular, the tobacco product filter may be suitable to form cigarette, small cigars and smoking pipes. | 02-16-2012 |
20120199147 | BIODEGRADABLE COMPOSITES - The present invention concerns a biodegradable cigarette filter tow comprising composite filaments of cellulose and cellulose acetate, and a process for making such a filter tow comprising providing a solution dope comprising a blend of cellulose and cellulose acetate in an ionic liquid or in N-methylmorphilone-N-oxide (NMMO), and spinning casting the blend into a protic solvent to generate fibres or films, and converting the fibres or films into cigarette filter tow. The invention also concerns cigarette filters and cigarettes made from such a filter tow. | 08-09-2012 |
20120325233 | CELLULOSE ESTERS HAVING MIXED-PHASE TITANIUM DIOXIDE PARTICLES FOR IMPROVED DEGRADATION - Degradable cellulose esters are disclosed that have incorporated therein or thereon mixed-phase titanium dioxide particles. The esters may be in the form of filters prepared by applying a plasticizer, having the mixed-phase titanium dioxide particles dispersed therein, to cellulose ester fibers to obtain plasticized cellulose ester fibers; and thereafter forming the plasticized cellulose ester fibers into a filter. Alternatively, the particles may be added to the dope from which the fibers are spun, or blended with a cellulose ester intended for molded articles. | 12-27-2012 |
20130255704 | Filter - A filter for a cigarette comprises a porous material sheet wrapped around the filter rod and a cellulose acetate thread formed tram substantially uncrimped cellulose acetate filaments. The cellulose acetate thread is positioned within the filter rod and extends along the central axis of the filter rod. | 10-03-2013 |
20140174461 | Surface Attachment of Particles to Cellulose Ester Fibers - This invention pertains to the surface attachment of particles, such as metal oxides, to cellulose ester fibers. The particles are applied to the surface of the cellulose ester fibers using a protic liquid that is substantially free of plasticizer. | 06-26-2014 |
20150289562 | FILTER SEGMENT COMPRISING AN ACETATE SALT AND GLYCERINE - A smoking article comprising a filter segment, the filter segment comprising a tow material and triacetin, wherein the filter segment further comprises an amino acid acetate salt and glycerine. The amino acid acetate salt and glycerine stabilise the triacetin in order to maintain the structural firmness of the tow material. | 10-15-2015 |
20150335069 | Degradable Cigarette Filter - A degradable cigarette filter includes a filter element of a bloomed cellulose acetate tow, a plug wrap surrounding the filter element, and either a coating or a pill in contact with the tow. The coating and/or pill may be composed of a material adapted to catalyze hydrolysis of the cellulose acetate tow and a water-soluble matrix material. The material may be an acid, an acid salt, a base, and/or a bacterium adapted to generate an acid. The coating may be applied to the tow, the plug wrap, or both. The pill may be placed in the filter element. When water contacts the water-soluble matrix material, the material adapted to catalyze hydrolysis is released and catalyzes the hydrolysis, and subsequent degradation, of the cellulose acetate tow. The foregoing is also applicable to articles made of cellulose esters. | 11-26-2015 |
20150374030 | BIODEGRADABLE CIGARETTE FILTER TOW AND METHOD OF MANUFACTURE - A biodegradable cigarette filter tow includes a mixture of at least two or more natural materials selected from the group consisting of hemp fiber, flax fiber, abaca fiber or pulp, sisal fiber or pulp, wood pulp, and cotton fiber or cotton flock. The mixture may also include regenerated cellulose fibers. The mixture may include a natural binder or may be hydroentangled. | 12-31-2015 |